The Russian freestyle ski federation said in a statement that Komissarova had a successful 6 1/2-hour operation after fracturing the 12th dorsal vertebrae in her lower-middle back and is in serious, but stable condition. She is expected to have a second spinal surgery in about two weeks, according to the federation.

The 23-year-old was not expected to contend for a medal.

"Slopestyle is a sport with a certain risk, you will never be able to exclude any kind of risk," IOC President Thomas Bach told Reuters. "We feel very sorry for the athlete."